- 02 12月, 2006 2 次提交
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由 Philip Langdale 提交于
This change adds support for the mmc4 4-bit wide-bus mode. The mmc4 spec defines 8-bit and 4-bit transfer modes. As we do not support any 8-bit hardware, this patch only adds support for the 4-bit mode, but it can easily be built upon when the time comes. The 4-bit mode is electrically compatible with SD's 4-bit mode but the procedure for turning it on is different. This patch implements only the essential parts of the procedure as defined by the spec. Two additional steps are recommended but not compulsory. I am documenting them here so that there's a record. 1) A bus-test mechanism is implemented using dedicated mmc commands which allow for testing the functionality of the data bus at the electrical level. This is pretty paranoid and they way the commands work is not compatible with the mmc subsystem (they don't set valid CRC values). 2) MMC v4 cards can indicate they would like to draw more than the default amount of current in wide-bus modes. We currently will never switch the card into a higher draw mode. Supposedly, allowing the card to draw more current will let it perform better, but the specs seem to indicate that the card will function correctly without the mode change. Empirical testing supports this interpretation. Signed-off-by: NPhilip Langdale <philipl@overt.org> Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>
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由 Philip Langdale 提交于
This adds support for the high-speed modes defined by mmc v4 (assuming the host controller is up to it). On a TI sdhci controller, it improves read speed from 1.3MBps to 2.3MBps. The TI controller can only go up to 24MHz, but everything helps. Another person has taken this basic patch and used it on a Nokia 770 to get a bigger boost because that controller can run at 48MHZ. Signed-off-by: NPhilip Langdale <philipl@overt.org> Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>
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- 09 11月, 2006 2 次提交
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由 Timo Teras 提交于
The card might go to inactive state (according to specification), if there are unsupported bits set in the OCR. Signed-off-by: NTimo Teras <timo.teras@solidboot.com> Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>
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由 Timo Teras 提交于
Some broken cards seem to process CMD1 even in stand-by state. The result is that the card replies with ILLEGAL_COMMAND error for the next command sent after rescanning. Currently the next command is select card, which would return the error. But CMD7 does actually succeed and retries of the command will timeout. The workaround is to poll card status after CMD1 to clear the pending error. Signed-off-by: NTimo Teras <timo.teras@solidboot.com> Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>
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- 04 10月, 2006 1 次提交
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由 Pierre Ossman 提交于
The MMC layer uses the standard work queue for doing card detection. As this queue is shared with other crucial subsystems, the effects of a long (and perhaps buggy) detection can cause the system to be unusable. E.g. the keyboard stops working while the detection routine is running. The solution is to add a specific mmc work queue to run the detection code in. This is similar to how other subsystems handle detection (a full kernel thread is the most common theme). Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 16 9月, 2006 1 次提交
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由 Russell King 提交于
data->blksz_bits is unused now - remove it. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 07 9月, 2006 2 次提交
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由 Russell King 提交于
Rather than having two places which independently calculate the timeout for data transfers, make it a library function instead. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk> Acked-by: NPierre Ossman <drzeus@drzeus.cx>
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由 Pierre Ossman 提交于
Secure Digital cards use a different algorithm to calculate the timeout for data transfers. Using the MMC one works often, but not always. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 04 7月, 2006 1 次提交
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由 Ingo Molnar 提交于
lockdep needs to have the waitqueue lock initialized for on-stack waitqueues implicitly initialized by DECLARE_COMPLETION(). Annotate mmc_wait_for_req()'s on-stack completion accordingly. Has no effect on non-lockdep kernels. Signed-off-by: NIngo Molnar <mingo@elte.hu> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 01 7月, 2006 1 次提交
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由 Jörn Engel 提交于
Signed-off-by: NJörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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- 20 5月, 2006 1 次提交
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由 Pavel Pisa 提交于
Patch from Pavel Pisa There has been problems that for some paths that clock are not stopped during new command programming and initiation. Result is issuing of incorrect command to the card. Some other problems are cleaned too. Noisy report of known ERRATUM #4 has been suppressed. Signed-off-by: NPavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 05 5月, 2006 1 次提交
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由 Russell King 提交于
Rather than having every driver duplicate the set_ios debugging, provide a single version in mmc.c which can be expanded as we add additional functionality. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 04 5月, 2006 1 次提交
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由 Russell King 提交于
mmc_request_done should be called at the end of handling a request, not between the data and initial command parts of the request. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 03 5月, 2006 1 次提交
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由 Russell King 提交于
The CSD contains a "read2write factor" which determines the multiplier to be applied to the read timeout to obtain the write timeout. We were ignoring this parameter, resulting in the possibility for writes being timed out too early. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 29 3月, 2006 1 次提交
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由 Russell King 提交于
Rather than each driver test MMC_DEBUG itself, and define DEBUG, pass it in via the makefile instead. Fix drivers to use pr_debug() where appropriate, and avoid defining a DEBUG() macro. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 02 2月, 2006 1 次提交
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由 Russell King 提交于
Some hosts need to know the command type, so pass it via a set of flags in cmd->flags. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 08 1月, 2006 1 次提交
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由 Pierre Ossman 提交于
Version 4 of the MMC specification increased the version number of the CID structure. None of the fields changed though so the only required change is adding '4' to the approved list. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 04 1月, 2006 1 次提交
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由 Russell King 提交于
Select a block size for IO based on the read and write block size combinations, and whether the card supports partial block reads and/or partial block writes. If we are able to satisfy block reads but not block writes, mark the device read only. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 14 12月, 2005 1 次提交
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由 Russell King 提交于
It seems that people get confused about what is happening in mmc_power_up(). Add a comment to make it clear why we have a two stage process. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 05 12月, 2005 1 次提交
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由 Pierre Ossman 提交于
The routine reading the SCR wasn't paying proper attention to the error codes returned from the driver. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 29 11月, 2005 1 次提交
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由 Pierre Ossman 提交于
A review against MMC/SD specifications found some errors in the current implementation. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 08 11月, 2005 1 次提交
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由 Uli Luckas 提交于
Patch from Uli Luckas This is a simplification of patch 3116/1 as sugested by Russell King. Signed-off-by: NUli Luckas <u.luckas@road-gmbh.de> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 09 9月, 2005 1 次提交
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由 Richard Purdie 提交于
Change mmc_detect_change() to take a delay argument such that the detection of card insertions and removals can be delayed according to the requirements of the host driver or platform. Signed-off-by: NRichard Purdie <rpurdie@rpsys.net> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 08 9月, 2005 5 次提交
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由 Pierre Ossman 提交于
Credit where credit is due. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Cc: Russell King <rmk@arm.linux.org.uk> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Pierre Ossman 提交于
Infrastructure for 4-bit bus transfers with SD cards. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Cc: Russell King <rmk@arm.linux.org.uk> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Pierre Ossman 提交于
Read the SD specific SCR register from the card. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Cc: Russell King <rmk@arm.linux.org.uk> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Pierre Ossman 提交于
Support for the read-only switch on SD cards which must be enforced by the host. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Cc: Russell King <rmk@arm.linux.org.uk> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Pierre Ossman 提交于
Support for the Secure Digital protocol in the MMC layer. A summary of the legal issues surrounding SD cards, as understood by yours truly: Members of the Secure Digital Association, hereafter SDA, are required to sign a NDA[1] before given access to any specifications. It has been speculated that including an SD implementation would forbid these members to redistribute Linux. This is the basic problem with SD support so it is unclear if it even is a problem since it has no effect on those of us that aren't members. The SDA doesn't seem to enforce these rules though since the patches included here are based on documentation made public by some of the members. The most complete specs[2] are actually released by Sandisk, one of the founding companies of the SDA. Because of this the NDA is considered a non-issue by most involved in the discussions concerning these patches. It might be that the SDA is only interested in protecting the so called "secure" bits of SD, which so far hasn't been found in any public spec. (The card is split into two sections, one "normal" and one "secure" which has an access scheme similar to TPM:s). (As a side note, Microsoft is working to make things easier for us since they want to be able to include the source code for a SD driver in one of their development kits. HP is making sure that the new NDA will allow a Linux implementation. So far only the SDIO specs have been opened up[3]. More will hopefully follow.) [1] http://www.sdcard.org/membership/images/ippolicy.pdf [2] http://www.sandisk.com/pdf/oem/ProdManualSDCardv1.9.pdf [3] http://www.sdcard.org/sdio/Simplified%20SDIO%20Card%20Specification.pdf This patch contains the central parts of the SD support. If no MMC cards are found on a bus then the MMC layer proceeds looking for SD cards. Helper functions are extended to handle the special needs of SD cards. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Cc: Russell King <rmk@arm.linux.org.uk> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 03 9月, 2005 1 次提交
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由 Pierre Ossman 提交于
Adds a new ios for setting the chip select pin on MMC cards. Needed on SD controllers which use this pin for other things and therefore cannot have it pulled high at all times. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 19 8月, 2005 2 次提交
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由 Russell King 提交于
Create a mmc_host class to allow enumeration of MMC host controllers even though they have no card(s) inserted. Patch based on work by Pierre Ossman. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
mmc_hostname() returns a pointer to the hostname for the mmc_host. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 17 4月, 2005 2 次提交
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由 Pavel Machek 提交于
This fixes u32 vs. pm_message_t in drivers/mmc, drivers/mtd and drivers/scsi. Signed-off-by: NPavel Machek <pavel@suse.cz> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Linus Torvalds 提交于
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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